On a biology test, a student got 25 questions correct but did not pass. On a second attempt, the student got 31 questions correct. What was the percent increase?

By switching service providers, a family's telephone bill decreased from about $50 a month to about $45. What was the percent decrease?

69 is 30% of what number?

What is 85% of 233?

43% of what number is 65?

900 is what percent of 1738?

The regular selling price of an item is $167. For a special year-end sale the price is at a markdown of 20%. Find the discount sale price.

A particular car gets fuel mileage of 30 mpg in the city and 12% more on the highway. What is the car's fuel mileage on the highway?

Find the simple interest. (The rate is an annual rate unless otherwise noted. Assume 360 days in a year.)

p = $80,200, r = 6%, t = 5 years

Find the simple interest. (The rate is an annual rate unless otherwise noted. Assume 360 days in a year.)

p = $460, r = 10%, t = 11 months

Find the simple interest. (The rate is an annual rate unless otherwise noted. Assume 360 days in a year.)

p = $1275, r = 9%, t = 15 days

Use the simple interest formula to determine the missing value. Round dollar amounts to the nearest cent and percents to the nearest hundredth when necessary.

p = $2600, r = ?, t = 4 years, i = $988.00

Use the simple interest formula to determine the missing value. Round dollar amounts to the nearest cent and percents to the nearest hundredth when necessary.

p = ?, r = 4%, t = 45 days, i = $43.93

Use the simple interest formula to determine the missing value. Round dollar amounts to the nearest cent and percents to the nearest hundredth when necessary.

p = $12,320, r = 2%, t = ?, i = $739.20

John forgot to pay his $355.00 income tax on time. The IRS charged a penalty of 3% for the 75 days the money was late. Find the penalty that was paid. (Use a 365 day year.)

Annie's cafe borrows $6600 at 6% for 240 days. Find the total amount that must be repaid after 240 days. (Use a 365 day year.)

Use a day counting table to find the exact number of days from the first date to the second date. Assume the year is not a leap year unless otherwise indicated.

September 11 to November 23

Use a day counting table to find the exact number of days from the first date to the second date. Assume the year is not a leap year unless otherwise indicated.

February 23 to October 16

Use a day counting table to find the exact number of days from the first date to the second date. Assume the year is not a leap year unless otherwise indicated.

August 25 to March 8

Use the compound interest formula to compute the total amount accumulated.

$800 for 5 years at 7% compounded quarterly

Use the compound interest formula to compute the total amount accumulated.

$2000 for 5 years at 5.5% compounded monthly

Brad invests $7900 in an account paying 6% compounded monthly. How much is in the account after 4 months?

Sumi Kato's savings account has a balance of $2327. After 13 years what will the amount of interest be at 2.5% compounded annually?

Determine the effective annual yield for $1 invested for 1 year at 3.5% compounded semiannually.

How much money should you invest now to have $8000 in 10 years if you invest the money at a rate of 7.6%, compounded semiannually?

To start a new business, Eric invests $765.13 each month in an ordinary annuity paying 7% interest compounded monthly. Find the amount in the annuity after 6 years.

Sandra deposits $3000 in an ordinary annuity at the end of each semiannual period at 4% interest compounded semiannually. Find the amount she will have on deposit after 11 years.

Mary needs $9000 in 11 years. What amount can she deposit in a sinking fund at the end of each quarter at 4% interest compounded quarterly so she will have her $9000?

On March 8, you sign a $6000 note with simple interest of 9% for 240 days. You make partial payments of $1100 on May 26 and $2300 on July 31. How much will you owe on the date of maturity?

In order to make some home improvements, a home owner spent $20,000. He paid 10% as a down payment and financed the balance of the purchase with a 36-month fixed installment loan with an APR of 4.5%. Determine the home owner's total finance charge and monthly payment.

A restaurant owner purchased a new dishwasher for $3500. She paid 8% down and financed the balance with a 12-month fixed installment loan with an APR of 8.5%. Determine the total finance charge and monthly payment for the loan.

A student has a total of $2500 in student loans that will be paid with a 48-month installment loan with monthly payments of $61.62. Determine the APR of the loan to the nearest one-half of a percent.

A college student purchased a used car for $4000. He paid 15% down and then paid 18 monthly payments of $200.30. Determine the APR of the loan to the nearest one-half of a percent.